225637537 has 2 divisors, whose sum is σ = 225637538. Its totient is φ = 225637536.

The previous prime is 225637513. The next prime is 225637547. The reversal of 225637537 is 735736522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200477281 + 25160256 = 14159^2 + 5016^2 .

It is a cyclic number.

It is not a de Polignac number, because 225637537 - 2¹¹ = 225635489 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225637537.

It is not a weakly prime, because it can be changed into another prime (225637547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112818768 + 112818769.

It is an arithmetic number, because the mean of its divisors is an integer number (112818769).

Almost surely, 2^225637537 is an apocalyptic number.

It is an amenable number.

225637537 is a deficient number, since it is larger than the sum of its proper divisors (1).

225637537 is an equidigital number, since it uses as much as digits as its factorization.

225637537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 40.

The square root of 225637537 is about 15021.2362007925. The cubic root of 225637537 is about 608.7941213574.

It can be divided in two parts, 2256 and 37537, that added together give a palindrome (39793).

The spelling of 225637537 in words is "two hundred twenty-five million, six hundred thirty-seven thousand, five hundred thirty-seven".